Boyzone will incorporate a number of tracks which feature Gately's voice on the album, Ronan Keating told Sky News.
Gately died from natural causes on October 10 while holidaying in Majorca. He was aged just 33.
Keating said: "We're going to make the next album for Stephen... we have a couple of songs with Stephen's vocal on it so that's a saving grace.
"Thank God we have that - that's very important to all of us and we know the fans would really appreciate that too."
He added: "We want to stick together because we find comfort in being together at the moment."